/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/pthread-ext/37_stack_lock_p0_vs_concur.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 11:53:37,352 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 11:53:37,422 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-26 11:53:37,426 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 11:53:37,427 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 11:53:37,445 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 11:53:37,446 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 11:53:37,446 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 11:53:37,447 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 11:53:37,451 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 11:53:37,451 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 11:53:37,451 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 11:53:37,452 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 11:53:37,453 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 11:53:37,453 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 11:53:37,453 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 11:53:37,454 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 11:53:37,454 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 11:53:37,454 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 11:53:37,454 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 11:53:37,455 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 11:53:37,455 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 11:53:37,456 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 11:53:37,456 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 11:53:37,456 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 11:53:37,457 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 11:53:37,457 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 11:53:37,457 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 11:53:37,457 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 11:53:37,458 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 11:53:37,458 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 11:53:37,459 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 11:53:37,459 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 11:53:37,459 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 11:53:37,459 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 11:53:37,460 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 11:53:37,788 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 11:53:37,805 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 11:53:37,807 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 11:53:37,807 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 11:53:37,808 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 11:53:37,811 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/37_stack_lock_p0_vs_concur.i [2023-08-26 11:53:39,043 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 11:53:39,352 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 11:53:39,352 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/37_stack_lock_p0_vs_concur.i [2023-08-26 11:53:39,379 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70632d819/9f4eba8dd75c4b24b8c6167cc2c6a844/FLAG41d733517 [2023-08-26 11:53:39,392 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70632d819/9f4eba8dd75c4b24b8c6167cc2c6a844 [2023-08-26 11:53:39,394 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 11:53:39,395 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 11:53:39,396 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 11:53:39,397 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 11:53:39,399 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 11:53:39,400 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 11:53:39" (1/1) ... [2023-08-26 11:53:39,400 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@225dde9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:53:39, skipping insertion in model container [2023-08-26 11:53:39,401 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 11:53:39" (1/1) ... [2023-08-26 11:53:39,455 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 11:53:39,794 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 11:53:39,806 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 11:53:39,836 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [253] [2023-08-26 11:53:39,838 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [253] [2023-08-26 11:53:39,862 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 11:53:39,895 INFO L206 MainTranslator]: Completed translation [2023-08-26 11:53:39,895 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:53:39 WrapperNode [2023-08-26 11:53:39,895 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 11:53:39,896 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 11:53:39,896 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 11:53:39,897 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 11:53:39,902 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:53:39" (1/1) ... [2023-08-26 11:53:39,915 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:53:39" (1/1) ... [2023-08-26 11:53:39,933 INFO L138 Inliner]: procedures = 171, calls = 27, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 88 [2023-08-26 11:53:39,934 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 11:53:39,935 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 11:53:39,935 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 11:53:39,935 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 11:53:39,942 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:53:39" (1/1) ... [2023-08-26 11:53:39,943 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:53:39" (1/1) ... [2023-08-26 11:53:39,945 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:53:39" (1/1) ... [2023-08-26 11:53:39,946 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:53:39" (1/1) ... [2023-08-26 11:53:39,951 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:53:39" (1/1) ... [2023-08-26 11:53:39,954 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:53:39" (1/1) ... [2023-08-26 11:53:39,955 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:53:39" (1/1) ... [2023-08-26 11:53:39,956 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:53:39" (1/1) ... [2023-08-26 11:53:39,959 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 11:53:39,959 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 11:53:39,960 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 11:53:39,960 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 11:53:39,960 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:53:39" (1/1) ... [2023-08-26 11:53:39,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 11:53:39,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:53:39,988 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-26 11:53:40,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-26 11:53:40,019 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 11:53:40,019 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-26 11:53:40,019 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-26 11:53:40,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 11:53:40,020 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 11:53:40,020 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 11:53:40,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 11:53:40,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 11:53:40,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 11:53:40,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 11:53:40,022 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 11:53:40,156 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 11:53:40,157 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 11:53:40,328 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 11:53:40,393 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 11:53:40,393 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-26 11:53:40,395 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 11:53:40 BoogieIcfgContainer [2023-08-26 11:53:40,395 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 11:53:40,397 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 11:53:40,398 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 11:53:40,400 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 11:53:40,401 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 11:53:39" (1/3) ... [2023-08-26 11:53:40,401 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d18e4c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 11:53:40, skipping insertion in model container [2023-08-26 11:53:40,401 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:53:39" (2/3) ... [2023-08-26 11:53:40,402 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d18e4c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 11:53:40, skipping insertion in model container [2023-08-26 11:53:40,402 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 11:53:40" (3/3) ... [2023-08-26 11:53:40,403 INFO L112 eAbstractionObserver]: Analyzing ICFG 37_stack_lock_p0_vs_concur.i [2023-08-26 11:53:40,421 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 11:53:40,421 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2023-08-26 11:53:40,421 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 11:53:40,526 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 11:53:40,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 95 transitions, 195 flow [2023-08-26 11:53:40,593 INFO L124 PetriNetUnfolderBase]: 8/107 cut-off events. [2023-08-26 11:53:40,593 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:53:40,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112 conditions, 107 events. 8/107 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 187 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 79. Up to 4 conditions per place. [2023-08-26 11:53:40,599 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 95 transitions, 195 flow [2023-08-26 11:53:40,603 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 95 transitions, 195 flow [2023-08-26 11:53:40,606 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 11:53:40,613 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 91 places, 95 transitions, 195 flow [2023-08-26 11:53:40,615 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 91 places, 95 transitions, 195 flow [2023-08-26 11:53:40,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 95 transitions, 195 flow [2023-08-26 11:53:40,638 INFO L124 PetriNetUnfolderBase]: 8/107 cut-off events. [2023-08-26 11:53:40,638 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:53:40,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112 conditions, 107 events. 8/107 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 187 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 79. Up to 4 conditions per place. [2023-08-26 11:53:40,640 INFO L119 LiptonReduction]: Number of co-enabled transitions 1950 [2023-08-26 11:53:42,822 INFO L134 LiptonReduction]: Checked pairs total: 3638 [2023-08-26 11:53:42,822 INFO L136 LiptonReduction]: Total number of compositions: 99 [2023-08-26 11:53:42,835 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 11:53:42,841 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@415f408a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 11:53:42,841 INFO L358 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2023-08-26 11:53:42,843 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 11:53:42,843 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 11:53:42,843 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:53:42,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:53:42,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:53:42,844 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-08-26 11:53:42,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:53:42,849 INFO L85 PathProgramCache]: Analyzing trace with hash 15425, now seen corresponding path program 1 times [2023-08-26 11:53:42,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:53:42,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837669380] [2023-08-26 11:53:42,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:53:42,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:53:42,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:53:43,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:53:43,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:53:43,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837669380] [2023-08-26 11:53:43,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837669380] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:53:43,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:53:43,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:53:43,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496753087] [2023-08-26 11:53:43,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:53:43,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:53:43,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:53:43,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:53:43,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:53:43,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 194 [2023-08-26 11:53:43,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 36 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:53:43,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:53:43,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 194 [2023-08-26 11:53:43,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:53:43,224 INFO L124 PetriNetUnfolderBase]: 64/154 cut-off events. [2023-08-26 11:53:43,224 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:53:43,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 306 conditions, 154 events. 64/154 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 605 event pairs, 56 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 283. Up to 142 conditions per place. [2023-08-26 11:53:43,228 INFO L140 encePairwiseOnDemand]: 186/194 looper letters, 23 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-08-26 11:53:43,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 29 transitions, 111 flow [2023-08-26 11:53:43,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:53:43,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:53:43,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 214 transitions. [2023-08-26 11:53:43,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36769759450171824 [2023-08-26 11:53:43,241 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 214 transitions. [2023-08-26 11:53:43,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 214 transitions. [2023-08-26 11:53:43,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:53:43,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 214 transitions. [2023-08-26 11:53:43,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:53:43,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 194.0) internal successors, (776), 4 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:53:43,251 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 194.0) internal successors, (776), 4 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:53:43,252 INFO L175 Difference]: Start difference. First operand has 37 places, 36 transitions, 77 flow. Second operand 3 states and 214 transitions. [2023-08-26 11:53:43,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 29 transitions, 111 flow [2023-08-26 11:53:43,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 29 transitions, 111 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 11:53:43,256 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 65 flow [2023-08-26 11:53:43,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2023-08-26 11:53:43,260 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -5 predicate places. [2023-08-26 11:53:43,261 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 65 flow [2023-08-26 11:53:43,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:53:43,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:53:43,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:53:43,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 11:53:43,262 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-08-26 11:53:43,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:53:43,262 INFO L85 PathProgramCache]: Analyzing trace with hash 15426, now seen corresponding path program 1 times [2023-08-26 11:53:43,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:53:43,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598793136] [2023-08-26 11:53:43,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:53:43,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:53:43,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:53:43,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:53:43,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:53:43,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598793136] [2023-08-26 11:53:43,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598793136] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:53:43,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:53:43,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:53:43,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291756636] [2023-08-26 11:53:43,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:53:43,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:53:43,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:53:43,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:53:43,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:53:43,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 194 [2023-08-26 11:53:43,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:53:43,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:53:43,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 194 [2023-08-26 11:53:43,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:53:43,482 INFO L124 PetriNetUnfolderBase]: 104/257 cut-off events. [2023-08-26 11:53:43,482 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:53:43,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 257 events. 104/257 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1011 event pairs, 53 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 508. Up to 131 conditions per place. [2023-08-26 11:53:43,486 INFO L140 encePairwiseOnDemand]: 189/194 looper letters, 45 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2023-08-26 11:53:43,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 52 transitions, 209 flow [2023-08-26 11:53:43,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:53:43,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:53:43,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 227 transitions. [2023-08-26 11:53:43,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3900343642611684 [2023-08-26 11:53:43,493 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 227 transitions. [2023-08-26 11:53:43,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 227 transitions. [2023-08-26 11:53:43,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:53:43,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 227 transitions. [2023-08-26 11:53:43,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:53:43,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 194.0) internal successors, (776), 4 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:53:43,497 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 194.0) internal successors, (776), 4 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:53:43,497 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 65 flow. Second operand 3 states and 227 transitions. [2023-08-26 11:53:43,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 52 transitions, 209 flow [2023-08-26 11:53:43,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 52 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:53:43,499 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 94 flow [2023-08-26 11:53:43,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2023-08-26 11:53:43,500 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -2 predicate places. [2023-08-26 11:53:43,500 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 94 flow [2023-08-26 11:53:43,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:53:43,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:53:43,501 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-26 11:53:43,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 11:53:43,501 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2023-08-26 11:53:43,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:53:43,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1370482660, now seen corresponding path program 1 times [2023-08-26 11:53:43,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:53:43,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870817954] [2023-08-26 11:53:43,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:53:43,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:53:43,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:53:43,524 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 11:53:43,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:53:43,549 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 11:53:43,549 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 11:53:43,550 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (32 of 33 remaining) [2023-08-26 11:53:43,552 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 33 remaining) [2023-08-26 11:53:43,557 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 33 remaining) [2023-08-26 11:53:43,558 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 33 remaining) [2023-08-26 11:53:43,558 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 33 remaining) [2023-08-26 11:53:43,558 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 33 remaining) [2023-08-26 11:53:43,559 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 33 remaining) [2023-08-26 11:53:43,559 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 33 remaining) [2023-08-26 11:53:43,559 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 33 remaining) [2023-08-26 11:53:43,559 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (23 of 33 remaining) [2023-08-26 11:53:43,559 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 33 remaining) [2023-08-26 11:53:43,560 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 33 remaining) [2023-08-26 11:53:43,560 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (20 of 33 remaining) [2023-08-26 11:53:43,560 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 33 remaining) [2023-08-26 11:53:43,560 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 33 remaining) [2023-08-26 11:53:43,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONASSERT (17 of 33 remaining) [2023-08-26 11:53:43,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 33 remaining) [2023-08-26 11:53:43,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 33 remaining) [2023-08-26 11:53:43,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 33 remaining) [2023-08-26 11:53:43,561 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 33 remaining) [2023-08-26 11:53:43,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 33 remaining) [2023-08-26 11:53:43,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 33 remaining) [2023-08-26 11:53:43,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 33 remaining) [2023-08-26 11:53:43,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 33 remaining) [2023-08-26 11:53:43,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 33 remaining) [2023-08-26 11:53:43,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 33 remaining) [2023-08-26 11:53:43,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (6 of 33 remaining) [2023-08-26 11:53:43,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 33 remaining) [2023-08-26 11:53:43,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 33 remaining) [2023-08-26 11:53:43,564 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (3 of 33 remaining) [2023-08-26 11:53:43,564 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 33 remaining) [2023-08-26 11:53:43,564 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 33 remaining) [2023-08-26 11:53:43,564 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONASSERT (0 of 33 remaining) [2023-08-26 11:53:43,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 11:53:43,565 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-26 11:53:43,567 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 11:53:43,567 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-26 11:53:43,639 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 11:53:43,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 161 transitions, 334 flow [2023-08-26 11:53:43,667 INFO L124 PetriNetUnfolderBase]: 15/187 cut-off events. [2023-08-26 11:53:43,668 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 11:53:43,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 187 events. 15/187 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 562 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 144. Up to 6 conditions per place. [2023-08-26 11:53:43,670 INFO L82 GeneralOperation]: Start removeDead. Operand has 153 places, 161 transitions, 334 flow [2023-08-26 11:53:43,673 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 153 places, 161 transitions, 334 flow [2023-08-26 11:53:43,673 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 11:53:43,673 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 153 places, 161 transitions, 334 flow [2023-08-26 11:53:43,673 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 153 places, 161 transitions, 334 flow [2023-08-26 11:53:43,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 161 transitions, 334 flow [2023-08-26 11:53:43,714 INFO L124 PetriNetUnfolderBase]: 15/187 cut-off events. [2023-08-26 11:53:43,714 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 11:53:43,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 187 events. 15/187 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 562 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 144. Up to 6 conditions per place. [2023-08-26 11:53:43,725 INFO L119 LiptonReduction]: Number of co-enabled transitions 12480 [2023-08-26 11:53:45,627 INFO L134 LiptonReduction]: Checked pairs total: 41619 [2023-08-26 11:53:45,627 INFO L136 LiptonReduction]: Total number of compositions: 123 [2023-08-26 11:53:45,629 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 11:53:45,630 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@415f408a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 11:53:45,630 INFO L358 AbstractCegarLoop]: Starting to check reachability of 48 error locations. [2023-08-26 11:53:45,631 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 11:53:45,632 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-08-26 11:53:45,632 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:53:45,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:53:45,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:53:45,632 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-26 11:53:45,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:53:45,633 INFO L85 PathProgramCache]: Analyzing trace with hash 26659, now seen corresponding path program 1 times [2023-08-26 11:53:45,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:53:45,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692013783] [2023-08-26 11:53:45,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:53:45,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:53:45,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:53:45,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:53:45,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:53:45,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692013783] [2023-08-26 11:53:45,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692013783] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:53:45,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:53:45,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:53:45,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876314631] [2023-08-26 11:53:45,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:53:45,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:53:45,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:53:45,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:53:45,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:53:45,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 284 [2023-08-26 11:53:45,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 78 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:53:45,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:53:45,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 284 [2023-08-26 11:53:45,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:53:46,866 INFO L124 PetriNetUnfolderBase]: 8149/14097 cut-off events. [2023-08-26 11:53:46,867 INFO L125 PetriNetUnfolderBase]: For 251/251 co-relation queries the response was YES. [2023-08-26 11:53:46,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27364 conditions, 14097 events. 8149/14097 cut-off events. For 251/251 co-relation queries the response was YES. Maximal size of possible extension queue 776. Compared 118576 event pairs, 3518 based on Foata normal form. 182/7350 useless extension candidates. Maximal degree in co-relation 21950. Up to 7262 conditions per place. [2023-08-26 11:53:46,971 INFO L140 encePairwiseOnDemand]: 274/284 looper letters, 106 selfloop transitions, 5 changer transitions 0/128 dead transitions. [2023-08-26 11:53:46,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 128 transitions, 495 flow [2023-08-26 11:53:46,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:53:46,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:53:46,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 423 transitions. [2023-08-26 11:53:46,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4964788732394366 [2023-08-26 11:53:46,973 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 423 transitions. [2023-08-26 11:53:46,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 423 transitions. [2023-08-26 11:53:46,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:53:46,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 423 transitions. [2023-08-26 11:53:46,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:53:46,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:53:46,978 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:53:46,978 INFO L175 Difference]: Start difference. First operand has 79 places, 78 transitions, 168 flow. Second operand 3 states and 423 transitions. [2023-08-26 11:53:46,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 128 transitions, 495 flow [2023-08-26 11:53:46,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 128 transitions, 493 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-26 11:53:46,982 INFO L231 Difference]: Finished difference. Result has 80 places, 78 transitions, 196 flow [2023-08-26 11:53:46,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=80, PETRI_TRANSITIONS=78} [2023-08-26 11:53:46,984 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 1 predicate places. [2023-08-26 11:53:46,984 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 78 transitions, 196 flow [2023-08-26 11:53:46,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:53:46,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:53:46,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:53:46,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 11:53:46,985 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-26 11:53:46,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:53:46,985 INFO L85 PathProgramCache]: Analyzing trace with hash 26661, now seen corresponding path program 1 times [2023-08-26 11:53:46,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:53:46,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205967058] [2023-08-26 11:53:46,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:53:46,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:53:46,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:53:47,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:53:47,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:53:47,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205967058] [2023-08-26 11:53:47,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205967058] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:53:47,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:53:47,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:53:47,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153965569] [2023-08-26 11:53:47,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:53:47,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:53:47,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:53:47,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:53:47,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:53:47,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 284 [2023-08-26 11:53:47,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 78 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:53:47,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:53:47,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 284 [2023-08-26 11:53:47,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:53:47,962 INFO L124 PetriNetUnfolderBase]: 5418/9630 cut-off events. [2023-08-26 11:53:47,962 INFO L125 PetriNetUnfolderBase]: For 3764/3764 co-relation queries the response was YES. [2023-08-26 11:53:47,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21686 conditions, 9630 events. 5418/9630 cut-off events. For 3764/3764 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 76999 event pairs, 4387 based on Foata normal form. 1292/7404 useless extension candidates. Maximal degree in co-relation 17894. Up to 8614 conditions per place. [2023-08-26 11:53:48,080 INFO L140 encePairwiseOnDemand]: 282/284 looper letters, 55 selfloop transitions, 1 changer transitions 0/77 dead transitions. [2023-08-26 11:53:48,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 77 transitions, 306 flow [2023-08-26 11:53:48,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:53:48,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:53:48,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 367 transitions. [2023-08-26 11:53:48,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4307511737089202 [2023-08-26 11:53:48,082 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 367 transitions. [2023-08-26 11:53:48,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 367 transitions. [2023-08-26 11:53:48,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:53:48,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 367 transitions. [2023-08-26 11:53:48,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:53:48,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:53:48,087 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:53:48,087 INFO L175 Difference]: Start difference. First operand has 80 places, 78 transitions, 196 flow. Second operand 3 states and 367 transitions. [2023-08-26 11:53:48,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 77 transitions, 306 flow [2023-08-26 11:53:48,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 77 transitions, 296 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:53:48,101 INFO L231 Difference]: Finished difference. Result has 79 places, 77 transitions, 186 flow [2023-08-26 11:53:48,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=79, PETRI_TRANSITIONS=77} [2023-08-26 11:53:48,103 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 0 predicate places. [2023-08-26 11:53:48,103 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 77 transitions, 186 flow [2023-08-26 11:53:48,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:53:48,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:53:48,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:53:48,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 11:53:48,105 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-26 11:53:48,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:53:48,106 INFO L85 PathProgramCache]: Analyzing trace with hash -602986851, now seen corresponding path program 1 times [2023-08-26 11:53:48,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:53:48,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707444732] [2023-08-26 11:53:48,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:53:48,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:53:48,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:53:48,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:53:48,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:53:48,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707444732] [2023-08-26 11:53:48,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707444732] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:53:48,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:53:48,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:53:48,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045679882] [2023-08-26 11:53:48,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:53:48,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:53:48,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:53:48,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:53:48,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:53:48,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 284 [2023-08-26 11:53:48,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 77 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:53:48,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:53:48,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 284 [2023-08-26 11:53:48,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:53:49,560 INFO L124 PetriNetUnfolderBase]: 8729/15256 cut-off events. [2023-08-26 11:53:49,561 INFO L125 PetriNetUnfolderBase]: For 2206/2206 co-relation queries the response was YES. [2023-08-26 11:53:49,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33398 conditions, 15256 events. 8729/15256 cut-off events. For 2206/2206 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 126013 event pairs, 2349 based on Foata normal form. 0/8421 useless extension candidates. Maximal degree in co-relation 33388. Up to 7271 conditions per place. [2023-08-26 11:53:49,647 INFO L140 encePairwiseOnDemand]: 266/284 looper letters, 100 selfloop transitions, 15 changer transitions 0/129 dead transitions. [2023-08-26 11:53:49,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 129 transitions, 543 flow [2023-08-26 11:53:49,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:53:49,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:53:49,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 404 transitions. [2023-08-26 11:53:49,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47417840375586856 [2023-08-26 11:53:49,650 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 404 transitions. [2023-08-26 11:53:49,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 404 transitions. [2023-08-26 11:53:49,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:53:49,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 404 transitions. [2023-08-26 11:53:49,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:53:49,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:53:49,653 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:53:49,654 INFO L175 Difference]: Start difference. First operand has 79 places, 77 transitions, 186 flow. Second operand 3 states and 404 transitions. [2023-08-26 11:53:49,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 129 transitions, 543 flow [2023-08-26 11:53:49,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 129 transitions, 542 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:53:49,657 INFO L231 Difference]: Finished difference. Result has 82 places, 91 transitions, 325 flow [2023-08-26 11:53:49,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=325, PETRI_PLACES=82, PETRI_TRANSITIONS=91} [2023-08-26 11:53:49,658 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 3 predicate places. [2023-08-26 11:53:49,658 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 91 transitions, 325 flow [2023-08-26 11:53:49,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:53:49,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:53:49,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:53:49,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 11:53:49,659 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-26 11:53:49,659 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:53:49,660 INFO L85 PathProgramCache]: Analyzing trace with hash -602986850, now seen corresponding path program 1 times [2023-08-26 11:53:49,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:53:49,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089205037] [2023-08-26 11:53:49,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:53:49,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:53:49,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:53:49,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:53:49,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:53:49,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089205037] [2023-08-26 11:53:49,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089205037] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:53:49,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:53:49,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:53:49,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97853571] [2023-08-26 11:53:49,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:53:49,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:53:49,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:53:49,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:53:49,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:53:49,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 284 [2023-08-26 11:53:49,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 91 transitions, 325 flow. Second operand has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:53:49,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:53:49,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 284 [2023-08-26 11:53:49,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:53:50,756 INFO L124 PetriNetUnfolderBase]: 6592/11535 cut-off events. [2023-08-26 11:53:50,757 INFO L125 PetriNetUnfolderBase]: For 5796/5804 co-relation queries the response was YES. [2023-08-26 11:53:50,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29886 conditions, 11535 events. 6592/11535 cut-off events. For 5796/5804 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 89190 event pairs, 2553 based on Foata normal form. 1154/8737 useless extension candidates. Maximal degree in co-relation 29875. Up to 9735 conditions per place. [2023-08-26 11:53:50,830 INFO L140 encePairwiseOnDemand]: 275/284 looper letters, 92 selfloop transitions, 3 changer transitions 0/113 dead transitions. [2023-08-26 11:53:50,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 113 transitions, 570 flow [2023-08-26 11:53:50,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:53:50,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:53:50,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 385 transitions. [2023-08-26 11:53:50,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4518779342723005 [2023-08-26 11:53:50,832 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 385 transitions. [2023-08-26 11:53:50,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 385 transitions. [2023-08-26 11:53:50,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:53:50,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 385 transitions. [2023-08-26 11:53:50,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:53:50,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:53:50,836 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:53:50,836 INFO L175 Difference]: Start difference. First operand has 82 places, 91 transitions, 325 flow. Second operand 3 states and 385 transitions. [2023-08-26 11:53:50,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 113 transitions, 570 flow [2023-08-26 11:53:50,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 113 transitions, 540 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:53:50,855 INFO L231 Difference]: Finished difference. Result has 76 places, 85 transitions, 289 flow [2023-08-26 11:53:50,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=289, PETRI_PLACES=76, PETRI_TRANSITIONS=85} [2023-08-26 11:53:50,856 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -3 predicate places. [2023-08-26 11:53:50,856 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 85 transitions, 289 flow [2023-08-26 11:53:50,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:53:50,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:53:50,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:53:50,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 11:53:50,857 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err8ASSERT_VIOLATIONARRAY_INDEX === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-26 11:53:50,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:53:50,857 INFO L85 PathProgramCache]: Analyzing trace with hash 350247975, now seen corresponding path program 1 times [2023-08-26 11:53:50,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:53:50,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750710537] [2023-08-26 11:53:50,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:53:50,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:53:50,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:53:50,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:53:50,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:53:50,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750710537] [2023-08-26 11:53:50,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750710537] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:53:50,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:53:50,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:53:50,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806390365] [2023-08-26 11:53:50,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:53:50,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:53:50,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:53:50,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:53:50,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:53:50,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 284 [2023-08-26 11:53:50,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 85 transitions, 289 flow. Second operand has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:53:50,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:53:50,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 284 [2023-08-26 11:53:50,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:53:51,970 INFO L124 PetriNetUnfolderBase]: 6319/11395 cut-off events. [2023-08-26 11:53:51,970 INFO L125 PetriNetUnfolderBase]: For 4255/4257 co-relation queries the response was YES. [2023-08-26 11:53:51,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28255 conditions, 11395 events. 6319/11395 cut-off events. For 4255/4257 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 87766 event pairs, 3130 based on Foata normal form. 0/7236 useless extension candidates. Maximal degree in co-relation 28244. Up to 9802 conditions per place. [2023-08-26 11:53:52,033 INFO L140 encePairwiseOnDemand]: 273/284 looper letters, 88 selfloop transitions, 8 changer transitions 0/116 dead transitions. [2023-08-26 11:53:52,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 116 transitions, 583 flow [2023-08-26 11:53:52,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 11:53:52,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 11:53:52,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 505 transitions. [2023-08-26 11:53:52,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44454225352112675 [2023-08-26 11:53:52,043 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 505 transitions. [2023-08-26 11:53:52,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 505 transitions. [2023-08-26 11:53:52,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:53:52,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 505 transitions. [2023-08-26 11:53:52,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 126.25) internal successors, (505), 4 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:53:52,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 284.0) internal successors, (1420), 5 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:53:52,047 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 284.0) internal successors, (1420), 5 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:53:52,047 INFO L175 Difference]: Start difference. First operand has 76 places, 85 transitions, 289 flow. Second operand 4 states and 505 transitions. [2023-08-26 11:53:52,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 116 transitions, 583 flow [2023-08-26 11:53:52,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 116 transitions, 571 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:53:52,053 INFO L231 Difference]: Finished difference. Result has 79 places, 92 transitions, 350 flow [2023-08-26 11:53:52,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=350, PETRI_PLACES=79, PETRI_TRANSITIONS=92} [2023-08-26 11:53:52,054 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 0 predicate places. [2023-08-26 11:53:52,055 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 92 transitions, 350 flow [2023-08-26 11:53:52,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:53:52,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:53:52,055 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-26 11:53:52,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 11:53:52,055 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-26 11:53:52,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:53:52,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1851168771, now seen corresponding path program 1 times [2023-08-26 11:53:52,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:53:52,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896118421] [2023-08-26 11:53:52,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:53:52,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:53:52,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:53:52,066 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 11:53:52,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:53:52,086 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 11:53:52,086 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 11:53:52,087 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (47 of 48 remaining) [2023-08-26 11:53:52,087 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 48 remaining) [2023-08-26 11:53:52,087 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 48 remaining) [2023-08-26 11:53:52,087 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 48 remaining) [2023-08-26 11:53:52,087 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 48 remaining) [2023-08-26 11:53:52,087 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 48 remaining) [2023-08-26 11:53:52,087 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 48 remaining) [2023-08-26 11:53:52,087 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 48 remaining) [2023-08-26 11:53:52,087 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 48 remaining) [2023-08-26 11:53:52,088 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (38 of 48 remaining) [2023-08-26 11:53:52,088 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 48 remaining) [2023-08-26 11:53:52,088 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 48 remaining) [2023-08-26 11:53:52,088 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (35 of 48 remaining) [2023-08-26 11:53:52,088 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 48 remaining) [2023-08-26 11:53:52,088 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 48 remaining) [2023-08-26 11:53:52,088 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONASSERT (32 of 48 remaining) [2023-08-26 11:53:52,088 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 48 remaining) [2023-08-26 11:53:52,088 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 48 remaining) [2023-08-26 11:53:52,088 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 48 remaining) [2023-08-26 11:53:52,089 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 48 remaining) [2023-08-26 11:53:52,089 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 48 remaining) [2023-08-26 11:53:52,089 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 48 remaining) [2023-08-26 11:53:52,089 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 48 remaining) [2023-08-26 11:53:52,089 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 48 remaining) [2023-08-26 11:53:52,089 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 48 remaining) [2023-08-26 11:53:52,089 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 48 remaining) [2023-08-26 11:53:52,089 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (21 of 48 remaining) [2023-08-26 11:53:52,089 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 48 remaining) [2023-08-26 11:53:52,089 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 48 remaining) [2023-08-26 11:53:52,090 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (18 of 48 remaining) [2023-08-26 11:53:52,090 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 48 remaining) [2023-08-26 11:53:52,090 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 48 remaining) [2023-08-26 11:53:52,090 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONASSERT (15 of 48 remaining) [2023-08-26 11:53:52,090 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 48 remaining) [2023-08-26 11:53:52,090 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 48 remaining) [2023-08-26 11:53:52,090 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 48 remaining) [2023-08-26 11:53:52,090 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 48 remaining) [2023-08-26 11:53:52,090 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 48 remaining) [2023-08-26 11:53:52,091 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 48 remaining) [2023-08-26 11:53:52,091 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 48 remaining) [2023-08-26 11:53:52,091 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 48 remaining) [2023-08-26 11:53:52,091 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONARRAY_INDEX (6 of 48 remaining) [2023-08-26 11:53:52,091 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 48 remaining) [2023-08-26 11:53:52,091 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 48 remaining) [2023-08-26 11:53:52,091 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11ASSERT_VIOLATIONARRAY_INDEX (3 of 48 remaining) [2023-08-26 11:53:52,093 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 48 remaining) [2023-08-26 11:53:52,094 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 48 remaining) [2023-08-26 11:53:52,094 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14ASSERT_VIOLATIONASSERT (0 of 48 remaining) [2023-08-26 11:53:52,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 11:53:52,094 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-08-26 11:53:52,095 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 11:53:52,095 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-26 11:53:52,145 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 11:53:52,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 215 places, 227 transitions, 475 flow [2023-08-26 11:53:52,184 INFO L124 PetriNetUnfolderBase]: 22/267 cut-off events. [2023-08-26 11:53:52,184 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-26 11:53:52,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283 conditions, 267 events. 22/267 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 965 event pairs, 0 based on Foata normal form. 0/188 useless extension candidates. Maximal degree in co-relation 209. Up to 8 conditions per place. [2023-08-26 11:53:52,187 INFO L82 GeneralOperation]: Start removeDead. Operand has 215 places, 227 transitions, 475 flow [2023-08-26 11:53:52,190 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 215 places, 227 transitions, 475 flow [2023-08-26 11:53:52,190 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 11:53:52,190 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 215 places, 227 transitions, 475 flow [2023-08-26 11:53:52,190 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 215 places, 227 transitions, 475 flow [2023-08-26 11:53:52,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 215 places, 227 transitions, 475 flow [2023-08-26 11:53:52,215 INFO L124 PetriNetUnfolderBase]: 22/267 cut-off events. [2023-08-26 11:53:52,215 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-26 11:53:52,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283 conditions, 267 events. 22/267 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 965 event pairs, 0 based on Foata normal form. 0/188 useless extension candidates. Maximal degree in co-relation 209. Up to 8 conditions per place. [2023-08-26 11:53:52,232 INFO L119 LiptonReduction]: Number of co-enabled transitions 31590 [2023-08-26 11:53:54,765 INFO L134 LiptonReduction]: Checked pairs total: 106919 [2023-08-26 11:53:54,765 INFO L136 LiptonReduction]: Total number of compositions: 168 [2023-08-26 11:53:54,767 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 11:53:54,767 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@415f408a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 11:53:54,767 INFO L358 AbstractCegarLoop]: Starting to check reachability of 63 error locations. [2023-08-26 11:53:54,768 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 11:53:54,768 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 11:53:54,768 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:53:54,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:53:54,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:53:54,768 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-08-26 11:53:54,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:53:54,769 INFO L85 PathProgramCache]: Analyzing trace with hash 41425, now seen corresponding path program 1 times [2023-08-26 11:53:54,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:53:54,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881047496] [2023-08-26 11:53:54,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:53:54,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:53:54,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:53:54,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:53:54,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:53:54,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881047496] [2023-08-26 11:53:54,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881047496] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:53:54,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:53:54,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:53:54,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320768374] [2023-08-26 11:53:54,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:53:54,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:53:54,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:53:54,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:53:54,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:53:54,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 395 [2023-08-26 11:53:54,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 113 transitions, 247 flow. Second operand has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:53:54,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:53:54,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 395 [2023-08-26 11:53:54,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:54:25,800 INFO L124 PetriNetUnfolderBase]: 353598/511449 cut-off events. [2023-08-26 11:54:25,800 INFO L125 PetriNetUnfolderBase]: For 17866/17866 co-relation queries the response was YES. [2023-08-26 11:54:26,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1009067 conditions, 511449 events. 353598/511449 cut-off events. For 17866/17866 co-relation queries the response was YES. Maximal size of possible extension queue 18392. Compared 4805503 event pairs, 142420 based on Foata normal form. 0/262571 useless extension candidates. Maximal degree in co-relation 371059. Up to 278868 conditions per place. [2023-08-26 11:54:28,771 INFO L140 encePairwiseOnDemand]: 382/395 looper letters, 160 selfloop transitions, 7 changer transitions 0/189 dead transitions. [2023-08-26 11:54:28,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 189 transitions, 745 flow [2023-08-26 11:54:28,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:54:28,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:54:28,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 607 transitions. [2023-08-26 11:54:28,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5122362869198313 [2023-08-26 11:54:28,778 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 607 transitions. [2023-08-26 11:54:28,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 607 transitions. [2023-08-26 11:54:28,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:54:28,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 607 transitions. [2023-08-26 11:54:28,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:28,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:28,786 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:28,786 INFO L175 Difference]: Start difference. First operand has 114 places, 113 transitions, 247 flow. Second operand 3 states and 607 transitions. [2023-08-26 11:54:28,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 189 transitions, 745 flow [2023-08-26 11:54:28,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 189 transitions, 737 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-26 11:54:28,813 INFO L231 Difference]: Finished difference. Result has 113 places, 113 transitions, 283 flow [2023-08-26 11:54:28,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=283, PETRI_PLACES=113, PETRI_TRANSITIONS=113} [2023-08-26 11:54:28,814 INFO L281 CegarLoopForPetriNet]: 114 programPoint places, -1 predicate places. [2023-08-26 11:54:28,814 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 113 transitions, 283 flow [2023-08-26 11:54:28,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:28,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:54:28,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:54:28,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 11:54:28,815 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-08-26 11:54:28,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:54:28,815 INFO L85 PathProgramCache]: Analyzing trace with hash 41426, now seen corresponding path program 1 times [2023-08-26 11:54:28,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:54:28,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348956335] [2023-08-26 11:54:28,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:54:28,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:54:28,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:54:28,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:54:28,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:54:28,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348956335] [2023-08-26 11:54:28,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348956335] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:54:28,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:54:28,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:54:28,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744212837] [2023-08-26 11:54:28,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:54:28,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:54:28,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:54:28,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:54:28,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:54:28,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 395 [2023-08-26 11:54:28,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 113 transitions, 283 flow. Second operand has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:28,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:54:28,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 395 [2023-08-26 11:54:28,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:54:51,465 INFO L124 PetriNetUnfolderBase]: 244825/356228 cut-off events. [2023-08-26 11:54:51,466 INFO L125 PetriNetUnfolderBase]: For 108858/108858 co-relation queries the response was YES. [2023-08-26 11:54:52,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 794014 conditions, 356228 events. 244825/356228 cut-off events. For 108858/108858 co-relation queries the response was YES. Maximal size of possible extension queue 12175. Compared 3226376 event pairs, 208424 based on Foata normal form. 35692/251261 useless extension candidates. Maximal degree in co-relation 610695. Up to 334123 conditions per place. [2023-08-26 11:54:53,702 INFO L140 encePairwiseOnDemand]: 393/395 looper letters, 87 selfloop transitions, 1 changer transitions 0/112 dead transitions. [2023-08-26 11:54:53,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 112 transitions, 457 flow [2023-08-26 11:54:53,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:54:53,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:54:53,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 525 transitions. [2023-08-26 11:54:53,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4430379746835443 [2023-08-26 11:54:53,704 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 525 transitions. [2023-08-26 11:54:53,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 525 transitions. [2023-08-26 11:54:53,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:54:53,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 525 transitions. [2023-08-26 11:54:53,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:53,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:53,708 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:53,708 INFO L175 Difference]: Start difference. First operand has 113 places, 113 transitions, 283 flow. Second operand 3 states and 525 transitions. [2023-08-26 11:54:53,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 112 transitions, 457 flow [2023-08-26 11:54:54,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 112 transitions, 443 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:54:54,099 INFO L231 Difference]: Finished difference. Result has 112 places, 112 transitions, 269 flow [2023-08-26 11:54:54,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=269, PETRI_PLACES=112, PETRI_TRANSITIONS=112} [2023-08-26 11:54:54,100 INFO L281 CegarLoopForPetriNet]: 114 programPoint places, -2 predicate places. [2023-08-26 11:54:54,100 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 112 transitions, 269 flow [2023-08-26 11:54:54,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:54,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:54:54,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:54:54,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 11:54:54,101 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-08-26 11:54:54,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:54:54,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1651019790, now seen corresponding path program 1 times [2023-08-26 11:54:54,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:54:54,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851709803] [2023-08-26 11:54:54,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:54:54,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:54:54,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:54:54,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:54:54,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:54:54,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851709803] [2023-08-26 11:54:54,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851709803] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:54:54,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:54:54,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:54:54,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261108473] [2023-08-26 11:54:54,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:54:54,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:54:54,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:54:54,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:54:54,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:54:54,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 395 [2023-08-26 11:54:54,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 112 transitions, 269 flow. Second operand has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:54,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:54:54,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 395 [2023-08-26 11:54:54,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:39,715 INFO L124 PetriNetUnfolderBase]: 448429/644108 cut-off events. [2023-08-26 11:55:39,715 INFO L125 PetriNetUnfolderBase]: For 90381/90381 co-relation queries the response was YES. [2023-08-26 11:55:40,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1404538 conditions, 644108 events. 448429/644108 cut-off events. For 90381/90381 co-relation queries the response was YES. Maximal size of possible extension queue 22405. Compared 6133822 event pairs, 177513 based on Foata normal form. 0/355495 useless extension candidates. Maximal degree in co-relation 1404527. Up to 353390 conditions per place. [2023-08-26 11:55:43,617 INFO L140 encePairwiseOnDemand]: 376/395 looper letters, 157 selfloop transitions, 18 changer transitions 0/194 dead transitions. [2023-08-26 11:55:43,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 194 transitions, 819 flow [2023-08-26 11:55:43,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:55:43,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:55:43,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 586 transitions. [2023-08-26 11:55:43,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49451476793248944 [2023-08-26 11:55:43,619 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 586 transitions. [2023-08-26 11:55:43,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 586 transitions. [2023-08-26 11:55:43,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:43,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 586 transitions. [2023-08-26 11:55:43,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.33333333333334) internal successors, (586), 3 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:43,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:43,622 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:43,622 INFO L175 Difference]: Start difference. First operand has 112 places, 112 transitions, 269 flow. Second operand 3 states and 586 transitions. [2023-08-26 11:55:43,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 194 transitions, 819 flow [2023-08-26 11:55:43,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 194 transitions, 818 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:55:43,634 INFO L231 Difference]: Finished difference. Result has 115 places, 129 transitions, 440 flow [2023-08-26 11:55:43,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=440, PETRI_PLACES=115, PETRI_TRANSITIONS=129} [2023-08-26 11:55:43,634 INFO L281 CegarLoopForPetriNet]: 114 programPoint places, 1 predicate places. [2023-08-26 11:55:43,635 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 129 transitions, 440 flow [2023-08-26 11:55:43,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:43,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:43,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:55:43,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 11:55:43,635 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-08-26 11:55:43,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:43,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1651019791, now seen corresponding path program 1 times [2023-08-26 11:55:43,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:43,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026117329] [2023-08-26 11:55:43,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:43,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:43,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:43,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:55:43,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:43,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026117329] [2023-08-26 11:55:43,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026117329] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:43,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:43,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:55:43,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216817891] [2023-08-26 11:55:43,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:43,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:55:43,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:43,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:55:43,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:55:43,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 395 [2023-08-26 11:55:43,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 129 transitions, 440 flow. Second operand has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:43,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:43,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 395 [2023-08-26 11:55:43,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:56:17,035 INFO L124 PetriNetUnfolderBase]: 334667/486809 cut-off events. [2023-08-26 11:56:17,036 INFO L125 PetriNetUnfolderBase]: For 200294/200294 co-relation queries the response was YES. [2023-08-26 11:56:17,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1199721 conditions, 486809 events. 334667/486809 cut-off events. For 200294/200294 co-relation queries the response was YES. Maximal size of possible extension queue 16898. Compared 4583710 event pairs, 102963 based on Foata normal form. 35340/345885 useless extension candidates. Maximal degree in co-relation 1199709. Up to 407476 conditions per place. [2023-08-26 11:56:20,134 INFO L140 encePairwiseOnDemand]: 387/395 looper letters, 155 selfloop transitions, 5 changer transitions 0/183 dead transitions. [2023-08-26 11:56:20,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 183 transitions, 908 flow [2023-08-26 11:56:20,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:56:20,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:56:20,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 571 transitions. [2023-08-26 11:56:20,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48185654008438816 [2023-08-26 11:56:20,139 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 571 transitions. [2023-08-26 11:56:20,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 571 transitions. [2023-08-26 11:56:20,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:56:20,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 571 transitions. [2023-08-26 11:56:20,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:20,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:20,142 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:20,143 INFO L175 Difference]: Start difference. First operand has 115 places, 129 transitions, 440 flow. Second operand 3 states and 571 transitions. [2023-08-26 11:56:20,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 183 transitions, 908 flow [2023-08-26 11:56:20,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 183 transitions, 872 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:56:20,849 INFO L231 Difference]: Finished difference. Result has 109 places, 123 transitions, 402 flow [2023-08-26 11:56:20,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=402, PETRI_PLACES=109, PETRI_TRANSITIONS=123} [2023-08-26 11:56:20,850 INFO L281 CegarLoopForPetriNet]: 114 programPoint places, -5 predicate places. [2023-08-26 11:56:20,850 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 123 transitions, 402 flow [2023-08-26 11:56:20,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:20,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:56:20,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:56:20,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 11:56:20,851 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err8ASSERT_VIOLATIONARRAY_INDEX === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-08-26 11:56:20,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:56:20,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1787125916, now seen corresponding path program 1 times [2023-08-26 11:56:20,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:56:20,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618575823] [2023-08-26 11:56:20,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:56:20,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:56:20,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:56:20,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:56:20,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:56:20,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618575823] [2023-08-26 11:56:20,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618575823] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:56:20,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:56:20,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:56:20,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961367896] [2023-08-26 11:56:20,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:56:20,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:56:20,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:56:20,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:56:20,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:56:20,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 395 [2023-08-26 11:56:20,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 123 transitions, 402 flow. Second operand has 4 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:20,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:56:20,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 395 [2023-08-26 11:56:20,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:56:51,839 INFO L124 PetriNetUnfolderBase]: 302089/446300 cut-off events. [2023-08-26 11:56:51,839 INFO L125 PetriNetUnfolderBase]: For 149420/149420 co-relation queries the response was YES. [2023-08-26 11:56:52,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1063524 conditions, 446300 events. 302089/446300 cut-off events. For 149420/149420 co-relation queries the response was YES. Maximal size of possible extension queue 14537. Compared 4145489 event pairs, 160434 based on Foata normal form. 0/281127 useless extension candidates. Maximal degree in co-relation 1063512. Up to 408931 conditions per place. [2023-08-26 11:56:54,639 INFO L140 encePairwiseOnDemand]: 383/395 looper letters, 131 selfloop transitions, 8 changer transitions 0/165 dead transitions. [2023-08-26 11:56:54,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 165 transitions, 808 flow [2023-08-26 11:56:54,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 11:56:54,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 11:56:54,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 733 transitions. [2023-08-26 11:56:54,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46392405063291137 [2023-08-26 11:56:54,642 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 733 transitions. [2023-08-26 11:56:54,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 733 transitions. [2023-08-26 11:56:54,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:56:54,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 733 transitions. [2023-08-26 11:56:54,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 183.25) internal successors, (733), 4 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:54,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 395.0) internal successors, (1975), 5 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:54,647 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 395.0) internal successors, (1975), 5 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:54,647 INFO L175 Difference]: Start difference. First operand has 109 places, 123 transitions, 402 flow. Second operand 4 states and 733 transitions. [2023-08-26 11:56:54,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 165 transitions, 808 flow [2023-08-26 11:57:07,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 165 transitions, 794 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:57:07,725 INFO L231 Difference]: Finished difference. Result has 112 places, 130 transitions, 461 flow [2023-08-26 11:57:07,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=461, PETRI_PLACES=112, PETRI_TRANSITIONS=130} [2023-08-26 11:57:07,725 INFO L281 CegarLoopForPetriNet]: 114 programPoint places, -2 predicate places. [2023-08-26 11:57:07,725 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 130 transitions, 461 flow [2023-08-26 11:57:07,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:57:07,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:57:07,726 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:57:07,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 11:57:07,726 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-08-26 11:57:07,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:57:07,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1989165864, now seen corresponding path program 1 times [2023-08-26 11:57:07,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:57:07,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139635666] [2023-08-26 11:57:07,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:57:07,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:57:07,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:57:07,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 11:57:07,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:57:07,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139635666] [2023-08-26 11:57:07,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139635666] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:57:07,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:57:07,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:57:07,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548602948] [2023-08-26 11:57:07,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:57:07,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:57:07,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:57:07,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:57:07,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:57:07,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 395 [2023-08-26 11:57:07,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 130 transitions, 461 flow. Second operand has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:57:07,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:57:07,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 395 [2023-08-26 11:57:07,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand